54 Cm Color TV Set

ATEC-PANDA

Type 2188

Type 2168

54 cm Color TV Set

Service Manual

Contents

1.Overview………………………………………………………………………………………2

2.Chassis Installation and Parts List………………………………………………………………3

3.Cabinet Parts List and Installation……………………………………………………………10

4.Signal Flow Diagram…………………………………………………………………………14

5.Adjustment Test…………………………………………………………………………………15

5.1I2C bus adjustment test…………………………………………………………………15

5.2Complete set adjustment test……………………………………………………………18

6.Trouble Shooting……………………………………………………………………………20

7.Overview of IC Function……………………………………………………………………24

8.IC and Voltage of Transistor…………………………………………………………………29

9.Resistance to Earth of Some Circuits………………………………………………………32

10.Waveform Diagrams…………………………………………………………………………34

Appendix 1 Explanation of Parts No.……………………………………………………………35

Appendix 2 Difference of CRT……………………………………………………………………50

Appendix 3 Circuit diagram………………………………………………………………………51

Appendix 4-1 Fig. PCB touch side…………………………………………………………………52

Appendix 4-2 Wire arrangement on PCB welding side…………………………………………53

1. Overview

This TV set Consist of main chip LA76814 controlled by Sanyo I2C bus and CPU LC863232A. LA76814 is IC dedicated for NTSC, integrated following circuits inside: amplifying and detecting in medium frequency, AFC, demodulating of sound medium frequency, brightness delay-line, filtering and demodulating of color signal, processing of horizontal small signals. In addition to the +B (B1) voltage of chassis controlled by potentiometer, others are controlled by CPU through the bus.

Functional feature:

1. Frequency Tuning (FS) 181 channels System (North & South America)

2. Receiving bands：AIR/STD/HRC/IRC

3. Color System：NTSC-M

4. Green Power Supply, Low STAND-BY Energy Consumption

5. X-Radiation Protection

6. One AV Input (Rear)

7. On Screen Display (OSD):Three Languages: English/Spanish/ Portuguese

8. All Functions Remote Control

9. Easy releaseof all channels with a single key

10. Closed Caption Decoder with CC1 , CC2 , T1 and T2 decoder capabilities

11. Caption only on Mute optionally selectable

12. Mute

13. Half Mute (50% Volume pressinga single key)

14. Without releasing MUTE Volume can be diminished

15. Smart Picture key: SOFT , STANDARD , SHARP and PERSONAL

16. Quick View key

17. Time-related features: (Alarm, Timer On/Off , Sleep) independently selectable

18. LOGO screen at Start Up with showing time selectable in TEST mode

20. Favorite Channels

21. MESSAGE feature

22. ALARM Feature up to 99 minutes 59 seconds

23. Scan

24. Volume Plus feature in all 181 channels independently

25. Power ON by pressing any key in the front panel

26. Blue Back, Noise Reducing, Black Stretch , RG gamma correction, Blue gamma correction

optionally selectable by the user

27. Autosearch

28. Call (Display) key in the Remite Control (RC) showing Channel Status, Alarm Time if

activated ,Sleep Time if activated, Favorite Channels and Clock if running

2. Installation and Parts List of Inner Works

Position Type Parts no.Position Type Parts no.

numberCarbon-filmnumberCarbon-film

resistor resistor

R1051/6W 22KRDB223J-NAARDR1571/6W 12KRDB123J-NAARD

R1061/6W 22KRDB223J-NAARDR1601/6W 470RDB471J-NAARD

R1081/6W 390KRDB394J-NAARDR1631/6W 33KRDB333J-NAARD

R1091/6W 8.2KRDB822J-NAARDR1651/6W 100KRDB104J-NAARD

R1101/6W 8.2KRDB822J-NAARDR1661/6W 22KRDB223J5NBAND

R1111/6W 1.5KRDB152J-NAARDR1901/6W 12KRDB123J-NAARD

R1121/6W 8.2KRDB822J-NAARDR1921/6W 39KRDB393J-NAARD

R1131/6W 390KRDB394J-NAARDR2021/6W 33KRDB333J-NAARD

R1141/6W 1MRDB105J-NAARDR2031/6W 100KRDB104J-NAARD

R1151/6W 100RDB101J-NAARDR2041/6W 100KRDB104J-NAARD

R1161/6W 4.7KRDB472J-NAARDR2051/6W 100RDB101J-NAARD

R1171/6W 10KRDB103J-NAARDR2061/6W 100RDB101J-NAARD

R1181/6W 27KRDB273J-NAARDR2071/6W 120RDB121J-NAARD

R1191/6W 10KRDB103J-NAARDR2081/6W 1KRDB102J-NAARD

R1201/6W 1KRDB102J-NAARDR2151/6W 330RDB331J-NAARD

R1211/6W 1KRDB102J-NAARDR2161/6W 270RDB271J-NAARD

R1221/6W 1KRDB102J-NAARDR2261/6W 8.2KRDB822J-NAARD

R1231/6W 1KRDB102J-NAARDR3141/6W 1KRDB102J-NAARD

R1241/6W 1KRDB102J-NAARDR3311/6W 3.3KRDB332J-NAARD

R1251/6W 1KRDB102J-NAARDR3451/6W 15KRDB153J-NAARD

R1261/6W 1KRDB102J-NAARDR3461/6W 10KRDB103J5NBAND

R1271/6W 1KRDB102J-NAARDR3731/6W 22KRDB223J-NAARD

R1281/6W 220RDB221J-NAARDR4021/6W 3.3KRDB332J-NAARD

R1291/6W 220RDB221J-NAARDR4051/6W 560RDB561J-NAARD

R1341/6W 1KRDB102J-NAARDR4061/4W 1RDC1R0J-NABRD

R1351/6W 100RDB101J-NAARDR4071/2W 330RDD331J4NBCND

R1371/6W 4.7KRDB472J-NAARDR4091/6W 4.7KRDB472J-NAARD

R1381/6W 4.7KRDB472J-NAARDR4101/6W 4.7KRDB472J-NAARD

R1391/6W 100RDB101J-NAARDR4111/6W 18KRDB183J-NAARD

R1401/6W 100RDB101J-NAARDR4121/6W 22KRDB223J-NAARD

R1411/4W 560RDC561J-NABRDR4311/2W 1.2KRDD122J4NBCND

R1421/6W 100KRDB104J-NAARDR4321/2W 680RDD681J4NBCND

R1431/6W 10KRDB103J-NAARDR5011/6W 2KRDB202J-NAARD

R1521/6W 1.2KRDB122J-NAARDR5021/6W 5.6KRDB562J-NAARD

R1531/6W 1.8KRDB182J-NAARDR5041/6W 1KRDB102J-NAARD

R1541/6W 2.7KRDB272J-NAARDR504A1/6W 680RDB681J6NBAND

R1551/6W 3.9KRDB392J-NAARDR5061/2W 1KRDD102J4NBCND

R1561/6W 6.8KRDB682J-NAARDR5081/2W 10KRDD103J4NBCND

Position Type Parts no.Position Type Parts no.

numberCarbon-filmnumberCarbon-film

resistor resistor

R5091/6W 10KRDB103J-NAARDR7641/6W 4.7KRDB472J-NAARD

R5141/4W 1KRDC102J-NABRDR8071/6W 100RDB101J-NAARD

R5261/6W 220KRDB224J-NAARDR8121/6W 100KRDB104J-NAARD

R6011/2W 220KRDD224J5NBCNDR818B1/6W 6.8KRDB682J-NAARD

R6051/6W 4.7KRDB472J-NAARDR9021/2W 1.8KRDD182J5NBCND

R6061/6W 120KRDB124J-NAARDR9051/6W 270RDB271J2NBAND

R6071/6W 10RDB100J-NAARDR9121/2W 1.8KRDD182J4NBCND

R6081/6W 10RDB100J-NAARDR9151/6W 270RDB271J2NBAND

R6101/6W 3KRDB302J-NAARDR9221/2W 1.8KRDD182J4NBCND

R6121/6W 1KRDB102J-NAARDR9251/6W 270RDB271J2NBAND

R6131/4W 22RDC220J-NABRDR9811/6W 2.7KRDB272J2NBAND

R6151/6W 820RDB821J-NAARDR9821/6W 2.7KRDB272J2NBAND

R6391/2W 47KRDD473J4NBCNDR9831/6W 2.7KRDB272J2NBAND

R639B1/2W 51KRDD513J4NBCNDR9851/6W 33RDB330J2NBAND

R6401/4W 2.4KRDC242J-NABRDRVD7011/6W 1.5KRDB152J-NAARD

R6411/6W 220RDB221J5NBANDR20011/6W 10KRDB103J-NAARD

R6421/6W 1KRDB102J-NAARDR20021/6W 10KRDB103J-NAARD

R6431/6W 10KRDB103J-NAARDR20031/6W 8.2KRDB822J-NAARD

R6441/6W 47KRDB473J-NAARDR20041/6W 10KRDB103J-NAARD

R6451/6W 470RDB471J-NAARDR30001/6W 100RDB101J-NAARD

R6511/6W 22KRDB223J-NAARDR30011/6W 100RDB101J-NAARD

R7011/6W 100RDB101J-NAARD

R7021/6W 100RDB101J-NAARD

R7031/6W 100RDB101J-NAARD Fuseresistor

R7041/6W 10KRDB103J-NAARDR9512W 3.9 RFF3R9J5ACDNF

R7051/6W 100RDB101J-NAARD

R7061/6W 100RDB101J-NAARD

R7081/6W 1KRDB102J-NAARDGlass grazed

R7091/6W 33RDB330J-NAARD resistor

R7131/6W 560KRDB564J-NAARDR6171/2W 120KRGDX124K504NZ

R7481/6W 1.2KRDB122J-NAARDR6181/2W 120KRGDX124K504NZ

R7491/6W 1KRDB102J-NAARDR6191/2W 24MRGDX246K504NZ

R7541/6W 1KRDB102J-NAARD

R7551/6W 22KRDB223J-NAARDMetal film

R7581/6W 12KRDB123J-NAARD resistor

R7591/6W 12KRDB123J-NAARDR4031/6W 10KRJB103F-NAARD

R7621/6W 1.2KRDB122J-NAARDR7571/6W 4.7K RJB472F-NAARD

Position Type Parts no.Position Type Parts no.

numberMetal oxidenumberCeramic

resistor capacitor

R1042W 8.2KRSF822J7ACDNDC10950V 0.01u CKF103Z1FA-FC

R2292W 56RSF560J7ACDNDC11050V 0.01u CKF103Z1FA-FC

R4041W 1.5RSE1R5J5DCCNDC11450V 560PCKF561K1BA-FC

R5031W 270RSE271J4ACCNDC11550V 560PCKF561K1BA-FC

R5072W 270RSF271J7ACDNDC11650V 560PCKF561K1BA-FC

R5101W 1KRSE102J5ACCNDC11750V 560PCKF561K1BA-FC

R5251W 12KRSE123J4ACCNDC11850V 100PCCF101J1CA-FC

R6001W 1KRSE102J4ACCNDC11950V 0.01uCKF103Z1FA-FC

R6043W 47KRSG473J7ACENDC12450V 0.01uCKF103Z1FA-FC

R604B3W 47KRSG473J7ACENDC12750V 0.01uCKF103Z1FA-FC

R6302W 56RSF560J7ACDNDC12850V 220PCCF221J1CA-FC

R7611W 4.7RSE4R7J4ACCNDC12950V 220PCCF221J1CA-FC

R9012W 15KRSF153J5ACDNDC13750V 100PCCF101J1CA-FC

R9112W 15KRSF153J5ACDNDC13850V 100PCCF101J1CA-FC

R9212W 15KRSF153J5ACDNDC13950V 15PCCF150J1CA-FC

R9311/2W 2.2RSD2R2J4ABBNDC20250V 0.01uCKF103Z1FA-FC

C20450V 0.01uCKF103Z1FA-FC

C22650V 0.01uCKF103Z1FA-FC

Wire resistor C30150V 0.01uCKF103Z1FA-FC

R5135W 3.9RWH3R9K3AK-NRC30350V 8PCCF8R0D1CA-FC

R602 RX27-3ARWH1R8K5AF-NRC30450V 1000PCKF102K1BA-FC

-5W-1.8C31850V 0.01uCKF103Z1FA-FC

R6035W 2.2KRWH222J5AQ-NRC40350V 1000PCKF102K1BA-FC

R6092W 0.22RWFR22K3AK-NRC50150V 0.01uCKF103Z1FA-FC

C506500V 3900PCKP392K1BA-FC

C508500V 1000PCKP102K1BA-FC

Potentiometer C5222KV 470PCKX471K2RL-ND

VR60120KBVDAAA203A001HC6002KV 470PCKX471K2RL-ND

C6031KV 1000PCKW102K2BL-ND

C6041KV 1000PCKW102K2BL-ND

C6051KV 1000PCKW102K2BL-ND

CeramicC6061KV 1000PCKW102K2BL-ND

capacitorC607B2KV 1000P CKX102K2R L-ND

C10350V 100P CCF101J1CA-FCC6092KV 470PCKX471K2RL-ND

C10450V 15PCCF150J1CA-FCC6102KV 680PCKX681K2RL-ND

C10550V 15P CCF150J1CA-FCC61150V 100PCCF101J1CA-FC

C10750V 0.01u CKF103Z1FA-FCC615 ~400V 2200PCKMX222M302ND

C10850V 0.01u CKF103Z1FA-FCC616 ~400V 220PCKMX221K302ND

Position Type Parts no.Position Type Parts no.

numberCeramicnumberElectrolytic

capacitor capacitor

C61850V 4700PCKF472K1BA-FCC30950V 10uCEF100M1ACAFP

C6211KV 470PCKW471K2RL-NDC31725V 1000u CED102M1AMHNP

C6231KV 470PCKW471K2RL-NDC32050V 1uCEF1R0M1ACAFP

C6251KV 470PCKW471K2RL-NDC36750V 10uCEF100M1ACAFP

C6272KV 470PCKX471K2RL-NDC36850V 2.2uCEF2R2M1ACAFP

C6291KV 1000PCKW102K2BL-NDC40435V 1000uCEE102M1AMHNP

C64150V 120PCCF121J1CA-FCC40535V 100uCEE101M1ACCFP

C698 ~400V 220PCKMX221K302NDC40650V 1uCEF1R0M1ACAFP

C70650V 0.01uCKF103Z1FA-FCC40850V 3.3uCEF3R3M1ACAFP

C71250V 0.01uCKF103Z1FA-FCC41435V 1000uCEE102M1AMHNP

C71950V 100PCCF101J1CA-FCC50225V 100u CED101M1AMBNP

C75350V 16PCCF160J1CA-FCC50450V 1uCEF1R0M1ACAFP

C75550V 1000PCKF102K1BA-FCC50735V 47uCEE470M1ACCFP

C77750V 100PCCF101J1CA-FCC515160V 2.2uCEH2R2M1ACCFP

C90350V 100PCCF101J1CL-NCC518 160V10uCEH100M1EMENP

C90450V 470PCKF471K1BL-NCC607400V 220uCEM221M3AESNK

C91350V 100PCCF101J1CL-NCC61325V 100u CED101M1AMBNP

C91450V 470PCKF471K1BL-NCC61750V 33uCEF330M1ACAFP

C92350V 100PCCF101J1CL-NCC62225V 2200uCED222M2A MKNP

C92450V 470PCKF471K1BL-NCC62416V 470uCEC471M1ACCFP

C9412KV 2200PCKX222K2BL-NDC62625V 1000u CED102M1AMHNP

C628 250V220u CEH221M2EMLNP

ElectrolyticC63035V 330uCEE331M1AMFNP

capacitorC63216V 470uCEC471M1ACCFP

C10150V 1uCEF1R0M1ACAFPC63550V 2.2uCEF2R2M1ACAFP

C10610V 470uCEB471M1AMCNPC63610V 1000uCEB102M1AMENP

C11250V 2.2uCEF2R2M1ACAFPC64516V 2200uCEC222M1AMHNP

C12016V 47uCEC470M1ACAFPC64716V 47uCEC470M1ACAFP

C12325V 100uCED101M1ACBFPC70150V 1uCEF1R0M1ACAFP

C12516V 2200u CEC222M1AMHNPC70250V 1uCEF1R0M1ACAFP

C12650V 10uCEF100M1ACAFPC70350V 1uCEF1R0M1ACAFP

C20516V 100uCEC101M1AMBNPC70450V 1uCEF1R0M1ACAFP

C20650V 1uCEF1R0M1ACAFPC70550V 1uCEF1R0M1ACAFP

C20950V 1uCEF1R0M1ACAFPC70716V 47uCEC470M1ACAFP

C21050V 0.47uCEFR47M1ACAFPC71316V 220uCEC221M1AMCNP

C21350V 1uCEF1R0M1ACAFPC71450V 2.2uCEF2R2M1ACAFP

C21850V 3.3uCEF3R3M1ACAFPC71516V 100uCEC101M1ACBFP

C21916V 47uCEC470M1ACAFPC72050V 1uCEF1R0M1ACAFP

Position Type Parts no.Position Type Parts no.

numberElectrolyticnumber

capacitor Inductor

C75250V 2.2uCEF2R2M1ACAFPL101 39uH-KLBB390K----RG

C75450V 0.47uCEFR47M1ACAFPL203 10uH-KLBB100K----RG

C75750V 10uCEF100M1ACAFPL334 47uH-KLAB470K1---NJ

C77316V 470uCEC471M1ACCFP Non-standard

C77416V 1000uCEC102M1AMFNP inductor

C81150V 1uCEF1R0M1ACAFPFB501M-COILLEA001-5---NJ

C81250V 10uCEF100M1ACAFPFB502M-COILLEA001-5---NJ

C931250V 22uCEK220M1EMHNPFB503M-COILLEA001-5---NJ

C200150V 10uCEF100M1ACAFPFB610M-COILLEA001-2---NJ

C200250V 10uCEF100M1ACAFPFB611M-COILLEA001-2---NJ

FB612M-COILLEA001-6---NJ

FB612A6*5*1.5mm LEE004-----NJ

FB612B6*5*1.5mmLEE004-----NJ

Film capacitorFB624A6*5*1.5mm LEE004-----NJ

C111100V 0.033uCFG333K1-L-NWFB624B6*5*1.5mm LEE004-----NJ

C11363V 0.1uCAY104K1-K-FJFB625A6*5*1.5mm LEE004-----NJ

C201100V 0.022uCFG223K1-L-NWFB625B6*5*1.5mm LEE004-----NJ

C20763V 0.1uCAY104K1-K-FJL502M-COILLEA001-3---NJ

C302100V 0.01uCFG103J1-L-NWLW545M-COILLEA001-3---NJ

C305100V 0.01uCFG103J1-L-NW

C319100V 4700PCFG472K1-L-NW

C40163V 0.47uCAY474K1-L-NJ Linearity filter

C40250V 0.22uCAY224K1-L-NJL601Linearity filterLG-003-----NL

C407100V 0.1uCFG104K1-L-NW

C409100V 0.022uCFG223K1-L-NW

C505100V 0.015uCFG153J1-L-NW

C509100V 0.056uCFG563K1-L-NW Horizontal linearity

C5111600V 9100PCMZ912J8-K-NSL501 Horizontal linearity correcting coil LF-015-2---NJ

C514250V 0.39uCMK394J8-K-NS

C51963V 0.1uCAY104K1-K-FJ

C601~275V 0.22uCMNX224M801NP

~275V 0.22uCMNX224M801NS Inter medium frequency coil

C608~250V 0.047uCMKX473K401NEL202 Matching interLTC001-N---NV

C61263V 0.1uCAY104K1-K-FJmedium frequency

C636B63V 0.1uCAY104K1-K-FJL20445.75MHZLTC020-C---NV

C64263V 0.1uCAY104K1-K-FJ

C643100V 0.033uCFG333K1-L-NW Themistor (PTC)

C750100V 0.047uCFG473K1-L-NWPS601MI73-18DH2180M001-NC

Position Type Parts no.Position Type Parts no.

numbernumber

LED Diode

VD112FG313003DLB52004---NAVD622RGP10DDRRGP10D-01ND

VD623RGP10DDRRGP10D-01ND

DiodeVD624BYW95CDRBYW95C---BP

VD102 MTZJ5R6BDZMTZJ5R6B-RRVD625RGP10DDRRGP10D---ND

VD103MTZJ3.6ADZMTZJ3R6A-RRVD633MTZJ15CDZMTZJ15C--RR

HZ4A2DZHZ4A2---RHVD641RGP10JDRRGP10J-01ND

VD1041N4148-T77DR1N4148---RRVD6431N4148-T77DR1N4148---RR

1N4148-T77DR1N4148---RH 1N4148-T77DR1N4148---RH

VD1051N4148-T77DR1N4148---RRVD644RGP10DDRRGP10D-01ND

1N4148-T77DR1N4148---RHVD645MTZJ6R2CDZMTZJ6R2C-RR

VD106MTZJ3.6ADZMTZJ3R6A-RR HZ6C3DZHZ6C3----RH

HZ4A2DZHZ4A2---RHVD7021N4148-T77DR1N4148---RR

VD107MTZJ5R6BDZMTZJ5R6B-RR 1N4148-T77DR1N4148---RH

VD1081N4148-T77DR1N4148---RRVD7031N4148-T77DR1N4148---RR

1N4148-T77DR1N4148---RH 1N4148-T77DR1N4148---RH

VD1111N4148-T77DR1N4148---RRVD7041N4148-T77DR1N4148---RR

1N4148-T77DR1N4148---RH 1N4148-T77DR1N4148---RH

VD114MTZJ5.1BDZMTZJ5R1B-RRVD7061N4148-T77DR1N4148---RR

HZ5C1DZHZ5C1---RH 1N4148-T77DR1N4148---RH

VD2001RGP10DDRRGP10D-01NDVD721MTZJ7.5CDZMTZJ7R5C-RR

VD2002MTZJ12ADZMTZJ12A--RR HZ7C2DZHZ7C2----RH

HZ11C2DZHZ11C2---RHVD809MTZJ5.1BDZMTZJ5R1B--RR

VD401RGP10DDRRGP10D-01ND HZ5C1DZHZ5C1---RH

VD501MTZJ8.2CDZMTZJ8R2C-RRVD9811N4148DR1N4148---NR

HZ9A3DZHZ9A3----RH 1N4148DR1N4148---NH

VD504RGP10JDRRGP10J-02ND

VD525BYD33G-TDRBYD33G---BP SAW Filter

VD603TTVR4JDRTTVR4J-01NZFL201M1967XFS031-----NB

VD604TTVR4JDRTTVR4J-01NZ

VD605TTVR4JDRTTVR4J-01NZ Crystal oscillator

VD606TTVR4JDRTTVR4J-01NZX7013.58MHzXX-012---01NL

VD6091N4148-T77DR1N4148---RRX10132KHzXX-015-----NW

1N4148-T77DR1N4148---RH

VD610RGP10DDRRGP10D-01ND Power switch

VD611RGP10JDRRGP10J---NGSW601KDC-A04-2KPW12HL011--D

VD612RGP10JDRRGP10J---NG

VD614RGP10DDRRGP10D-02ND Fuse

VD621RGP15DDRRGP15D-01NDF601250V 3.15AFBA3154S02C-A

Position Type Parts no.Position Type Parts no.

numbernumber

Transistor Push switch

V1022PA1015GQ2PA1015-GNF-SW1017.5mmKTA11VA004--G(Y)

V1032PC1815GQ2PC1815-GNF-SW1027.5mmKTA11VA004--G(Y)

V1072PC1815GQ2PC1815-GNF-SW1037.5mmKTA11VA004--G(Y)

V1082PA1015GQ2PA1015-GNF-SW1047.5mmKTA11VA004--G(Y)

V1142PC1815GQ2PC1815-GNF-SW1057.5mmKTA11VA004--G(Y)

V2032PA1015GQ2PA1015-GNF-SW1067.5mmKTA11VA004--G(Y)

V3022PC1815GQ2PC1815-GNF-

V501KSC23830QKSC2383-0NF- Socket connector

V502KSD5702QKSD5702--BN-XS601TJC1-2AGAAV2001----Y

V6042PC1815GQ2PC1815-GNF-HETJC2-1AGABV1002----Y

V613STP6NC60QSTP6NC60--N-XS602TJC2-2AGABV2001----N

V642MCR22-6QMCR22-6---G-DYTJC2-5AGABV5001----Y

V6432PC1815GQ2PC1815-GNF-XS151TJC3-2AGACV2001----Y

V7012PC1815GQ2PC1815-GNF-KPTJC3-5AGACV5001----Y

V9012SC2482Q2SC2482--NN-XS3101TJC3-6AGACV6001----Y

KSC2330KQTJC3-6AGACV6002----Y

V9112SC2482Q2SC2482--NN-

KSC2330

V9212SC2482Q2SC2482--NN-XS901CRT SocketGBAVL007----A

KSC2330

XS801AV terminalGBBH2-02----Y

IC

VD110CW574CSNCW574CS---N-TPAGCTest probeGABV1001----Y

N103HS0038BNHS0038B---N-

V640KA431ZNKA431Z----F-

N602KA7805NKA7805----N-Transformer

N603KA7812NKA7812----N-T501 Horizontal driveTD-0004----0L

N102KS24C04INKS24C04---N-IT502 Fly Back Transformer TF-0058----1D

24LC04BPN24LC04BP--N-T601 Power supply transformer TM-0047----0L

AT24C04NAT24C04---N-

N201LA76814NLA76814---N- FS Tuner

N401LA7840NLA7840----N-A101 Frequency combined screw thread BXATB007F---H

N101LC863232A-5V16NLC863232A-NA

N604LTV817CNLTV817C---N-

N601MC44608P75NMC44608P75N-F501AFuse clampMB0X0011---G8

N304TDA7056BNTDA7056B--N-F501BFuse clampMB0X0011---G8

3. Cabinet Part list and Installation of Housing

The part list and structural installation of cabinet of Type 2188 and 2168 are respectively described as follows:

3.1 The part list and structural installation of cabinet of Type 2188

Partial list of Type 2188 Cuban cabinet

—1—

1．Front Case

2．Loudspeakers (2)

Tap screws ST4X12 (8)

3．Trademark

4．Elastic engaged ring (2)

5．Combined button

Tap screws ST3X12 (2)

6．Lens

7．Transparent window

8．Optical conductor

Tap screws ST3X12 (2)

9．Power switch

10．Press spring

11．Supported blocks M6 (4)

Tap screws ST4X20 (12)

12．Nuts with quincunx washer（4）

13．combined nuts（4）

14．Support of Fly Back Transformer

Tap screws ST4X12 (1)

Tap screws ST4X16 (1)

15．Rear cover

16．Mark Label on rear cover

—1—

Structural installation

3.2 The part list and structural installation of cabinet of Type 2168

Partial list of Type 2168 Cuban cabinet

—1—

1．Front cabinet

2．Loudspeakers (2)

Tap screws ST4X12 (8)

3．Trademark

4．Elastic engaged ring (2)

5．Combined button

Tap screws ST3X10 (3)

6．Guide light beam

Tap screws ST3X10 (2)

7．Transparent window

8．Power switch

9．Press spring

10．Rubber gasket (4)

11．Metal gasket (4)

12．Combined nuts5X40（4）

13．Rear cover

14．Support of high voltage package

Tap screws ST4X12 (1)

Tap screws ST4X16 (1)

15．Hook of power cord

16．Mark label on rear cover

—1—

Structural installation

4. Signal flow Diagram

This TV set Consist of main chip LA76814 controlled by Sanyo I2C bus and CPU LC863232A .

LA76814 is IC dedicated for NTSC, integrated following circuits inside: amplifying and detecting in intermedium frequency, AFC, demodulating of sound intermedium frequency, brightness delay-line, filtering and demodulating of color signal, processing of horizontal-vertical small signals.

TDA7056B is used for power amplifier of sound signal.

LA7840 is used for vertical power amplifier.

The detailed signal flow diagram is shown as follows:

Signal block diagram

5. Adjustment Test

5.1 I2C Bus Adjustment Test

5.1.1 Method of access busadjustment test menu

Using remote controller, press “MUTE”, at same time presses “MENU” on Front cabinet “TEST” characters can display on the TV set screen, i.e. the bus adjustment status has been entered, then press “0”~”9” numeric key on the remote controller, and into corresponding adjustment menu. After adjustment, exit the adjustment status according the same method. In addition, in case of normal use of TV set, short-circuited the jumper W325 and W326 can enter the status “TEST”.

5.1.2 Explanation of adjustment test menu

[M0] MENU

◎When enter MENU0 adjustment test menu, CPU will automatically

set “Picture” to status of “Standard”, and close “Picture enhancement” setting.

Description:

TEST SIGNAL=0, receive TV signals.

TEST SIGNAL=1, receive white signals produced inside of CPU.

TEST SIGNAL=2, receive gray signals produced inside of CPU.

TEST SIGNAL=3, receive black signals produced inside of CPU.

TEST SIGNAL=4, receive pane and cross signals produced inside of CPU.

SOUND TRAP used for fine adjustment of sound trap frequency.

WOOFER for woofer control, ON is available.

[M1] MENU

◎MENU 1 setting

·When enter MENU1 adjustment test menu, CPU will automatically

set “Picture” to status of “Standard”, and close “Picture enhancement” setting.

Description:

·LA76814: when LA76814 used as main chip, set this item to ON.

·PAL-M/PAL-N/NTSC: When LA 76812 used as main chip, the
color system is selected.

·ENGLISH/ESPANOL/PORTUGUES: for screen language

selection: English/Espanol/Portuguese.

[M2] MENU

◎MENU 2 setting

·When enter MENU2 adjustment menu, CPU will automatically
set “Picture” to status of “Standard”, and close “Picture enhancement” setting .

Description:

·AV2: set ON to available.

·S-VIDEO: set ON to available.

·OSD-CONT: Set the contrast of OSD.

·WIDE/ZOOM: set the size of zoom.

[M3] MENU

◎MENU3 for vertical and horizontal circuits adjustment test, about
the method of adjustment test, see “5 Complete set adjustment test”.

·H-PHASE: adjustment test item of picture horizontal center.

·V-POSI: adjustment test item of picture vertical center.

·V-SIZE: adjustment test item of picture vertical amplitude.

·V-LIN: adjustment test item of picture vertical scan Non-linearity.

·V-SC: adjustment test item of picture vertical S calibration.

·OSD H DISPLAY: adjustment test item of D horizontal display
position .

[M4] MENU

◎MENU4 for RF-AGF adjustment test, about the method of
adjustment test, refer to “5Complete set adjustment test”.

·RF AGC: for RF-AGC adjustment test.

[M5]MENU

◎MENU5 for adjustment test of Screen/White balance/Sub
brightness, about the method of adjustment test, see “5Complete set
adjustment test”.

·When enter MENU5 adjustment test menu, CPU will automatically
set “Picture enhancement” to status of “closed”, color saturation to 0,
brightness to 50.

·CLColor saturation control

BTBrightness control

CTContrast control

SBSub-brightness

·RB/GB/BBCutoff of red/green/blue gun

·RD/GD/BDExcite of red/green/blue gun

[M6]MENU

◎MENU6 for setting of color decode item.

·When enter MENU6 adjustment test menu, CPU will automatically
set “Picture” to status of “Standard”, and close “Picture enhancement”
setting.

·R/B BALANCER/B balance

R/B ANGLER/B decode and demodulation angles.

[M7]MENU

◎MENU7

·When enter MENU7 adjustment test menu, CPU will automatically
set “Picture” to status of “Standard”, and close “Picture enhancement”.

·H blank LHorizontal blanking (left)

H blank RHorizontal blanking (right)

V.COMP(Vertical size compensation) Compensating vertical size influenced by contrast.

H.FreqHorizontal frequency (It is unnecessary to adjust in batch production.)

FBP.BL.SWSelect working manner of horizontal blanking.

0=Selected IC inside horizontal blanking

1=Selected IC both inside and outside FBP horizontal blanking.

[M8]MENU

◎MENU8 for parameters setting

·When enter MENU8 adjustment test menu, CPU will automatically
set “Picture” to status of “Standard”, and close “Picture enhancement”.

·SUB BASSSub-bass

SUB TREBLESub-treble

LOGO TIMESetting of LOGO display duration time

[M9]MENU

◎MENU for parameters setting

·When enter MENU9 adjustment test menu, CPU will automatically
set “Picture” to status of “Standard”, and close “Picture enhancement”.

·FM GAIN Sound frequency discrimination gain

VIDEO LEVEL Video detection output level

OSD CONSTANT OSD contrast

SUB COLOR NTSC system sub-color

SUB COLOR PAL system sub-color

SUB SHARP Sub-sharpness

SUB TINT Sub-tint

RBI ABL TH Adjustment of ABL initial control position

BRI ABL 1=ABL unable

0=ABL enable

5.1.3 Preset of I2C bus adjustment test item (Preset related to CRT used)

5.2 Complete set adjustment test method

5.2.1 Set main power supply (+B)

Receive color bar signals, and set “Picture” to “Standard” status. Adjusting VR601, let +B voltage = 1170.5 V.

5.2.2 IF adjustment test

a)Connect 45.75 MHz 100 dB signal to TUNER IF test point.

b)Measure voltage of N201/PIN47.

c)Adjusting L204, let V47=3.40.1 V.

5.2.3 I2C bus adjustment test method

1. MENU3 for horizontal and vertical scan circuit adjustment, receive the signals of black-white test card (numeric card).

a)Adjusting H-SHIFT value, let the picture horizontal center align at horizontal center of tube screen.

b)Adjusting V-POSI value, let the picture vertical center align at vertical center of tube screen.

c)Adjusting V-SIZE value, let the picture vertical amplitude conform to requirement.

d)Adjusting V-LIN value, let the picture vertical linearity conform to requirement.

e)Adjusting V-SIZE value, let the heights of top and bottom panes of picture equal to that of the center pane.

f)Adjusting OSD H DISPLAY value, let position of display bars (with number figures at side) is symmetrical about right and left sides.

2. MENU4 for RF AGC adjustment

Receiving 60 dBu (1 mV) color bar signals, adjust AGC value (the voltage from high to low), let the picture noise gradually reduced to level just aware.

3. MENU5 for adjustment of CRT cutoff, dark and Bright balance, and sub-brightness

After pre-heating the TV set fully, receive gray-white two-step signals.

a)Adjusting BT (brightness) value and CT (contrast) value, of FBT let the brightness of white level and gray level of picture conform to conventional requirement of adjustment of manufactory.

b)Select option to SC and press V+, then adjust Screen potentiometer of FBT, let a dim mono-color (one color of red, green and blue, sometimes may lean to yellow, violet or white) horizontal light line display on screen. Remember this color, press the numeric key 1, 2, 5, 6, 9, 0, let the horizontal light line become to white, then adjust SCREEN potentiometer again, let the horizontal light line become to just can visible.

c)Select option to RB, GB and BB, and adjust RB, GB and BB values, let the gray color temperature meet the requirement.

d)Select option to RD, GD and BD, and adjust RD, GD and BD values, let the white color temperature meet the requirement.

e)Repeat c) and d) steps, let both gray and white temperature simultaneously meet the requirement.

f)Receiving black-white 8-step signals, adjust SB (sub-brightness) value, let the difference between first step and second (the most dim) step can just distinguish.

3.2.4 Checking x-ray protective circuit

a)Short-circuit jumperTP2001 and TP2002, activate protective circuit.

b)Remove the short circuit wires, and then press CH+ or CH- key, TV set startup again.

6. Trouble shooting

Complete set power supply outline

6.1 No raster, no picture, no sound

General, these failures are produced by power sources, because of which refer to a wider area, so that can be divided them two conditions to explain: no +B 117 V and existing +B 117 V.

(1) No +B(117 V) voltage (voltage of network 110 V ac)

These failures may be caused by switching type power. Because of the TV set has no-load protection, over-load protection, over-current protection, once these protections are activated, the CPU will enter to “STAND BY” status. So that status confuses with conventional CPU standby, some difficulties are occurred for failure estimation. When the switching type power supply operating normally +B=117 V, but +B=17 V when come into standby status.

(2) Existing +B 117 V

These failures may be caused by abnormal operation of horizontal scan circuit, to confirm which can observe the filament of tube whether bright on. If determined horizontal scan in abnormal operation, look for the failure start from the horizontal drive stage. Search upward to LA76814 with method of checking dc voltage and waveform according to sequence: N201 PIN27/H.OUT port N201 PIN25 power supply N603/15 V output N101CPU/PIN42(STAND BY) output.